[BCPVP]

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This means that things like 'the Church' are completely meaningless. Every single person in the church acts at his own behalf and his own whim and has nothing to do with the others in the group?

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I think it's meaningless to assign fault to an inanimate object when it is certain people who are really the ones who have caused the damage.

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People who chose to associate with the group acted.

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Fine

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The actions of these people can be attributed to some shared property of all members of the group.

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Ok

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Any people who join the group are likely to embrace and encourage said actions.

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Not necessarily. Do you think all the Catholics of the days of the Inquistion were fine with such actions? Do you think many Catholics agree with those actions today? This is where such a view of "action" leads you to misplace blame where it is deserved. If we are to use the OP's view of action, those who associate with the Church are just as guilty as those who performed those actions in the past. Do you really think that's a useful view to take? If so, then we need to condemn a hell of a lot more than just the Catholic Church...